static void wpa_bss_remove(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
const char *reason)
{
if (wpa_s->last_scan_res) {
unsigned int i;
for (i = 0; i < wpa_s->last_scan_res_used; i++) {
if (wpa_s->last_scan_res[i] == bss) {
os_memmove(&wpa_s->last_scan_res[i],
&wpa_s->last_scan_res[i + 1],
(wpa_s->last_scan_res_used - i - 1)
* sizeof(struct wpa_bss *));
wpa_s->last_scan_res_used--;
break;
}
}
}
wpa_bss_update_pending_connect(wpa_s, bss, NULL);
dl_list_del(&bss->list);
dl_list_del(&bss->list_id);
wpa_s->num_bss--;
wpa_dbg(wpa_s, MSG_DEBUG, "BSS: Remove id %u BSSID " MACSTR
" SSID '%s' due to %s", bss->id, MAC2STR(bss->bssid),
wpa_ssid_txt(bss->ssid, bss->ssid_len), reason);
wpas_notify_bss_removed(wpa_s, bss->bssid, bss->id);
wpa_bss_anqp_free(bss->anqp);
os_free(bss);
}
static struct wpa_bss *
wpa_bss_update(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
struct wpa_scan_res *res, struct os_reltime *fetch_time)
{
u32 changes;
changes = wpa_bss_compare_res(bss, res);
if (changes & WPA_BSS_FREQ_CHANGED_FLAG)
wpa_printf(MSG_DEBUG, "BSS: " MACSTR " changed freq %d --> %d",
MAC2STR(bss->bssid), bss->freq, res->freq);
bss->scan_miss_count = 0;
bss->last_update_idx = wpa_s->bss_update_idx;
wpa_bss_copy_res(bss, res, fetch_time);
/* Move the entry to the end of the list */
dl_list_del(&bss->list);
#ifdef CONFIG_P2P
if (wpa_bss_get_vendor_ie(bss, P2P_IE_VENDOR_TYPE) &&
!wpa_scan_get_vendor_ie(res, P2P_IE_VENDOR_TYPE)) {
/*
* This can happen when non-P2P station interface runs a scan
* without P2P IE in the Probe Request frame. P2P GO would reply
* to that with a Probe Response that does not include P2P IE.
* Do not update the IEs in this BSS entry to avoid such loss of
* information that may be needed for P2P operations to
* determine group information.
*/
wpa_dbg(wpa_s, MSG_DEBUG, "BSS: Do not update scan IEs for "
MACSTR " since that would remove P2P IE information",
MAC2STR(bss->bssid));
} else
#endif /* CONFIG_P2P */
if (bss->ie_len + bss->beacon_ie_len >=
res->ie_len + res->beacon_ie_len) {
os_memcpy(bss + 1, res + 1, res->ie_len + res->beacon_ie_len);
bss->ie_len = res->ie_len;
bss->beacon_ie_len = res->beacon_ie_len;
} else {
struct wpa_bss *nbss;
struct dl_list *prev = bss->list_id.prev;
dl_list_del(&bss->list_id);
nbss = os_realloc(bss, sizeof(*bss) + res->ie_len +
res->beacon_ie_len);
if (nbss) {
unsigned int i;
for (i = 0; i < wpa_s->last_scan_res_used; i++) {
if (wpa_s->last_scan_res[i] == bss) {
wpa_s->last_scan_res[i] = nbss;
break;
}
}
if (wpa_s->current_bss == bss)
wpa_s->current_bss = nbss;
wpa_bss_update_pending_connect(wpa_s, bss, nbss);
bss = nbss;
os_memcpy(bss + 1, res + 1,
res->ie_len + res->beacon_ie_len);
bss->ie_len = res->ie_len;
bss->beacon_ie_len = res->beacon_ie_len;
}
dl_list_add(prev, &bss->list_id);
}
if (changes & WPA_BSS_IES_CHANGED_FLAG)
wpa_bss_set_hessid(bss);
dl_list_add_tail(&wpa_s->bss, &bss->list);
notify_bss_changes(wpa_s, changes, bss);
return bss;
}
